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A value that represents the force created by the flow of plastic past the wires of an integrated circuit; also called the sweep index.
The wire-sweep index is the sum of viscosity times velocity at each grid point in the model, with the result averaged by the number of grid points.
A wire-sweep index that is high in regions of the model containing wires indicates a possible location for wire breakage.
Since viscosity depends on temperature, shear rate, and the rate of cure, a wire-sweep index may be reduced by changes to these variables.